Circuits which self-destruct under radiation are provided. In one aspect, a method for creating a radiation-sensitive circuit is provided. The method includes the step of: connecting an integrated circuit to a power supply and to a ground in parallel with at least one dosimeter device, wherein the dosimeter device is configured to change from being an insulator to being a conductor under radiation. Radiation-sensitive circuits are also provided.
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1. A method for creating a radiation-sensitive circuit, the method comprising the step of: connecting an integrated circuit to a power supply and to a ground in parallel with at least one dosimeter device, wherein the at least one dosimeter device is configured to change from being an insulator to being a conductor under radiation, wherein the connecting step comprises the step of: connecting the integrated circuit to the power supply and to the ground in parallel with multiple dosimeter devices, wherein each of the dosimeter devices is configured to change from being an insulator to being a conductor under a given type of radiation and thereby establish a direct connection between the power supply and the ground, wherein the multiple dosimeter devices comprise at least one first dosimeter device and at least one second dosimeter device, wherein the at least one first dosimeter device comprises a first matrix of carbon nanotubes coated in a first radiation-sensitive polymer, and wherein the first radiation-sensitive polymer is configured to decompose under a first type of radiation.
A method for creating a radiation-sensitive circuit involves connecting an integrated circuit to a power supply and ground. This connection is done in parallel with multiple dosimeter devices. Each dosimeter changes from an insulator to a conductor when exposed to a specific type of radiation, creating a direct short circuit between the power supply and ground, thus destroying the circuit. The dosimeters include at least a first and second type. The first dosimeter is a matrix of carbon nanotubes coated with a radiation-sensitive polymer that decomposes under a first type of radiation.
2. The method of claim 1 , further comprising the step of: irradiating the radiation-sensitive circuit to change the at least one dosimeter device from being an insulator to being a conductor and thereby establishing the direct connection between the power supply and the ground which destroys the radiation-sensitive circuit.
The method for creating a radiation-sensitive circuit (connecting an integrated circuit to a power supply and ground in parallel with at least one dosimeter device, where the dosimeter changes from an insulator to a conductor under radiation, establishing a direct connection between the power supply and ground) also includes irradiating the circuit. This irradiation causes the dosimeter to switch from an insulator to a conductor, creating a direct short circuit between the power supply and ground, which destroys the radiation-sensitive circuit.
3. The method of claim 1 , wherein the at least one dosimeter device comprises a matrix of carbon nanotubes coated in a radiation-sensitive polymer, wherein the radiation sensitive polymer is configured to decompose under radiation.
The method for creating a radiation-sensitive circuit (connecting an integrated circuit to a power supply and ground in parallel with at least one dosimeter device, where the dosimeter changes from an insulator to a conductor under radiation, establishing a direct connection between the power supply and ground) uses a dosimeter made of a matrix of carbon nanotubes coated in a radiation-sensitive polymer. This polymer is designed to decompose when exposed to radiation, causing the dosimeter to become conductive.
4. The method of claim 3 , wherein the radiation-sensitive polymer is selected from the group consisting of: poly(olefin sulfone)s, polyacrylamide, and poly (methyl methacrylate) (PMMA).
The method using a dosimeter made of a matrix of carbon nanotubes coated in a radiation-sensitive polymer that decomposes under radiation, uses a radiation-sensitive polymer selected from poly(olefin sulfone)s, polyacrylamide, or poly(methyl methacrylate) (PMMA). These polymers break down when exposed to radiation, enabling the carbon nanotubes to conduct.
5. The method of claim 1 , further comprising the step of forming the at least one dosimeter device in a packaging level of the integrated circuit.
The method for creating a radiation-sensitive circuit (connecting an integrated circuit to a power supply and ground in parallel with at least one dosimeter device, where the dosimeter changes from an insulator to a conductor under radiation, establishing a direct connection between the power supply and ground) involves forming the dosimeter device within the packaging of the integrated circuit itself. This integrates the self-destruct mechanism directly into the IC package.
6. The method of claim 5 , further comprising the steps of: preparing a suspension of carbon nanotubes; coating the carbon nanotubes in a radiation-sensitive polymer to form polymer-coated carbon nanotubes; and depositing the polymer-coated carbon nanotubes onto a packaging layer of the integrated circuit to form a matrix of the polymer-coated carbon nanotubes on the packaging layer of the integrated circuit.
The method where the dosimeter is formed in the IC package (connecting an integrated circuit to a power supply and ground in parallel with at least one dosimeter device, where the dosimeter changes from an insulator to a conductor under radiation) includes preparing a suspension of carbon nanotubes, coating them with a radiation-sensitive polymer, and then depositing these coated nanotubes onto a packaging layer of the integrated circuit. This creates a matrix of polymer-coated nanotubes on the IC packaging, acting as the dosimeter.
7. The method of claim 4 , further comprising the step of: forming at least one first metal contact and at least one second metal contact to the matrix of the polymer-coated carbon nanotubes.
The method using a radiation-sensitive polymer selected from poly(olefin sulfone)s, polyacrylamide, or poly(methyl methacrylate) (PMMA) and a dosimeter made of a matrix of carbon nanotubes coated in that polymer also forms at least one first metal contact and at least one second metal contact to the matrix of polymer-coated carbon nanotubes. These metal contacts facilitate the electrical connection to the power supply and ground.
8. The method of claim 7 , wherein the at least one first metal contact and the at least one second metal contact are formed on opposite sides of the matrix of the polymer-coated carbon nanotubes.
The method with metal contacts to the nanotube matrix (connecting an integrated circuit to a power supply and ground in parallel with at least one dosimeter device, where the dosimeter changes from an insulator to a conductor under radiation) places the first and second metal contacts on opposite sides of the matrix of polymer-coated carbon nanotubes. This arrangement provides a clear electrical path through the dosimeter when it becomes conductive.
9. The method of claim 7 , further comprising the steps of: connecting the at least one first metal contact to the power supply; and connecting the at least one second metal contact to the ground.
The method with metal contacts to the nanotube matrix (connecting an integrated circuit to a power supply and ground in parallel with at least one dosimeter device, where the dosimeter changes from an insulator to a conductor under radiation) connects the first metal contact to the power supply and the second metal contact to ground. This completes the parallel circuit that allows the dosimeter to short the power supply to ground when activated by radiation.
10. The method of claim 1 , wherein the at least one second dosimeter device comprises a second matrix of carbon nanotubes coated in a second radiation-sensitive polymer, wherein the second radiation-sensitive polymer is configured to decompose under a second type of radiation.
The method for creating a radiation-sensitive circuit uses multiple dosimeters (connecting an integrated circuit to a power supply and ground in parallel with multiple dosimeter devices, each changing from an insulator to a conductor under specific radiation types). Specifically, the second dosimeter is a matrix of carbon nanotubes coated in a second, different, radiation-sensitive polymer. This second polymer decomposes under a second, different, type of radiation.
11. The method of claim 10 , wherein the first radiation-sensitive polymer is poly(olefin sulfone)s or polyacrylamide, and the second radiation-sensitive polymer is PMMA, and wherein the first type of radiation is gamma radiation and the second type of radiation is beta radiation.
In the method using first and second dosimeters with different radiation sensitivities (connecting an integrated circuit to a power supply and ground in parallel with multiple dosimeter devices, each changing from an insulator to a conductor under specific radiation types), the first radiation-sensitive polymer is poly(olefin sulfone)s or polyacrylamide, and the second radiation-sensitive polymer is PMMA. The first type of radiation is gamma radiation, and the second type of radiation is beta radiation, allowing for sensitivity to different radiation types.
12. A method for creating a radiation-sensitive circuit, the method comprising the step of: connecting an integrated circuit to a power supply and to a ground in parallel with at least one first dosimeter device and at least one second dosimeter device, wherein the at least one first dosimeter device is configured to change from being an insulator to being a conductor under a first type of radiation, and wherein the at least one second dosimeter device is configured to change from being an insulator to being a conductor under a second type of radiation.
A method for creating a radiation-sensitive circuit connects an integrated circuit to a power supply and ground in parallel with at least a first and a second dosimeter device. The first dosimeter changes from an insulator to a conductor when exposed to a first type of radiation. The second dosimeter changes from an insulator to a conductor when exposed to a second, different, type of radiation. This allows the circuit to be sensitive to multiple radiation types.
13. The method of claim 12 , wherein the at least one first dosimeter device comprises a first matrix of carbon nanotubes coated in a first radiation-sensitive polymer, wherein the first radiation-sensitive polymer is configured to decompose under the first type of radiation.
In the method with multiple dosimeters sensitive to different radiation types (connecting an integrated circuit to a power supply and ground in parallel with multiple dosimeter devices, each changing from an insulator to a conductor under specific radiation types), the first dosimeter consists of a matrix of carbon nanotubes coated in a first radiation-sensitive polymer. This polymer is configured to decompose when exposed to the first type of radiation, allowing the nanotubes to conduct.
14. The method of claim 13 , wherein the at least one second dosimeter device comprises a second matrix of carbon nanotubes coated in a second radiation-sensitive polymer, wherein the second radiation-sensitive polymer is configured to decompose under the second type of radiation.
In the method with multiple dosimeters (connecting an integrated circuit to a power supply and ground in parallel with multiple dosimeter devices, each changing from an insulator to a conductor under specific radiation types, where the first dosimeter is a matrix of carbon nanotubes coated in a polymer that decomposes under radiation), the second dosimeter comprises a second matrix of carbon nanotubes coated in a second radiation-sensitive polymer. This second polymer decomposes when exposed to a second type of radiation.
15. The method of claim 14 , wherein the first radiation-sensitive polymer is poly(olefin sulfone)s or polyacrylamide, and the second radiation-sensitive polymer is PMMA, and wherein the first type of radiation is gamma radiation and the second type of radiation is beta radiation.
In the method using first and second dosimeters with different radiation sensitivities (connecting an integrated circuit to a power supply and ground in parallel with multiple dosimeter devices, each changing from an insulator to a conductor under specific radiation types, where the first dosimeter is a matrix of carbon nanotubes coated in a polymer that decomposes under radiation, and the second dosimeter is a matrix of carbon nanotubes coated in a polymer that decomposes under radiation), the first polymer is poly(olefin sulfone)s or polyacrylamide, and the second is PMMA. The first radiation type is gamma, and the second is beta, for detecting different radiation sources.
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June 25, 2015
June 20, 2017
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